Search

Professional and personal files including Armstrong's correspondence with professional associations, other engineers, and friends, his research notes, circuit diagrams, lectures, articles, legal papers, and other related materials. Of his many inventions and developments, the most important are: 1) the regenerative or feedback circuit, 1912, the first amplified radio reception, 2) the superheterodyne circuit, 1918, the basis of modern radio and radar, 3) superregeneration, 1922, a very simple, high-power receiver now used in emergency mobile service, and 4) frequency modulation - FM, 1933, static-free radio reception of high fidelity. More than half the files concern his many lawsuits, primarily with Radio Corporation of America, over infringement of the Armstrong patents. Litigation continued until 1967. Other files deal with his work in the Marcellus Hartley Research Laboratory at Columbia University, 1913-1935, and with the American Expeditionary Forces in France during World War I, his Air Force contracts for communications development, Army research during World War II, the Radio Club of America, the Institute of Radio Engineers, FM development at his radio station at Alpine, N.J., the use of FM in television, his involvement in Federal Communications Commission hearings and legislation, and his work with the Zenith Radio Corporation. Also, letters to H.J. Round

The General Manuscript Collection is an artificial collection of correspondence, diaries, lecture notes, class work, essays, administrative documents, minutes, and other documents collected by the Rare Book & Manuscript Library. Single items or very small collections are generally classified as part of the general manuscript collection rather than assigned an individual manuscript number. Additionally, small additions to existing RBML manuscript collections may be classified as part of the General Manuscript Collection.

Five manuscripts, one map, and four books formerly belonging to various members of the Van Cortlandt family: New York (Colony) Laws, Statutes, etc. Lawes Establish'd by the Authority of his Majesties Letters Patents.. By virtue of a Commission from.. James Duke of Yorke.. 1664. This first set of laws for New York, commonly known as the "Duke's Laws" were promulgated by Governor Richard Nicolls, after a meeting with representatives in Hempstead, Long Island, on March 1, 1664. Bound with this code are nine additions most of which are "Orders made at the Generall Court of Assizes held in New York" 1664-1672. The texts are written in several different hands and signed variously by Richard Nicolls (1624-1672), first governor of New York, 1664-1668; Matthias Nicolls (1630?-1687), Richard's brother and secretary to the province during the period covered; and Francis Lovelace (1618?-1675?), brother of the poet Richard Lovelace and governor of New York, 1668-1673. Written copies of this code were prepared for all the towns on Long Island. Of these copies only four are apparently extant, including this one and one in the New York Historical Society.